JP2745391B2 - Winding device for surface-treated metal strip and its winding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device and a winding method for winding a surface-treated metal strip such as a plated steel plate or a coated steel plate into a coil.

[0002]

2. Description of the Related Art It is known from Japanese Patent Publication No. 6-102215 that a winding start end of a metal strip is automatically wound around a winding core by a belt wrapper in a winding apparatus of this kind. Examples of a tensioning device for giving a moderate back tension to a metal strip to be wound include Japanese Patent Publication No. 1-23.
No. 207, a roll bridle is generally used. A metal strip is wound around two rolls in a Z-shape, and the number of rotations of each roll is varied, so that a back tension is applied to the metal strip. Is given.

[0003]

In a conventional apparatus for winding a metal strip while applying a back tension with a roll bridle, it may not be possible to provide a sufficient back tension to the metal strip. This is because, since the tension is applied by the contact friction between the rotating roll and the metal strip, the maximum value of the tension that can be applied is limited, and the change width of the tension that can be applied is small. It is. This means that the metal strip cannot be wound in a tightly wound state, and this causes a problem particularly when the strip width is large.

[0004] In the roll bridle, a larger tension may be applied by increasing the diameter of the roll or increasing the number of rolls. However, even at present, the roll diameter is sufficiently large, so use a roll with a larger diameter,
Alternatively, if the number of used devices is increased, it is inevitable that the space occupied by the tensioning device as a whole is increased, thereby increasing the equipment cost. In particular, when the number of rolls is increased, a drive mechanism such as a motor and a speed reducer must be provided for each roll, and the overall apparatus becomes bulky.

[0005] The surface of the roll applied to the roll bridle is polished extremely smoothly in order to prevent scratches on the plating layer and the coating film, and the roundness and surface roughness are maintained in a predetermined state. The need to maintain regular maintenance is indispensable. During such maintenance work, the roll must be disassembled from the tensioning device and the roll surface must be polished again, which has the disadvantage of requiring much labor and time for maintenance. When starting the winding operation, the operation of winding the metal strip around each roll in a Z-shape is troublesome.

An object of the present invention is to provide a metal strip with sufficient back tension so that the metal strip can be wound into a coil in a tightly tightened state, and the metal strip sent from the preceding processing step can be automatically wound. It is an object of the present invention to provide a winding device for a surface-treated metal strip and a winding method for the same, which can start winding. SUMMARY OF THE INVENTION It is an object of the present invention to provide a winding device and a winding method capable of applying an appropriate back tension to a metal strip from the start of winding of the metal strip to the end of winding. An object of the present invention is to reduce the installation space occupied by a tensioning device as compared with a conventional winding device, reduce the line length of a metal strip processing line such as a plating line or a painting line, and effectively use the space in a factory. Can,
In addition, it is an object of the present invention to provide a winding device and a winding method thereof that require less total equipment cost. An object of the present invention is to provide a winding device provided with a belt bridle type tensioning device that can perform maintenance work with a small amount of time and a winding method thereof.

[0007]

The winding device according to the present invention comprises a belt bridle type tensioning device 1, a start sensor 3 and a belt bridle type tensioning device 1 along a conveying path of a surface-treated metal strip S as shown in FIG. The deflector roll 19 and the winder 5 provided with the belt wrapper 4 are arranged in order.

As shown in FIG. 3, the tensioning device 1 has a pair of upper and lower winding mechanisms 8, 9 for holding the metal strip S, and an operation for operating at least one of the two mechanisms 8, 9 toward and away from the other side. Vessel 10. Each of the two winding mechanisms 8 and 9 includes a pair of left and right pulleys 15 and 15 fixed to the pulley shaft 11 and a plurality of sets of winding elements including a pair of friction belts 16 wound between the pulleys 15 and 15. And a guide body 13 for receiving the inner surface of the group of friction belts 16 in contact with the metal strip S. These winding mechanisms 8
At least one of 9 is rotationally driven by the driving mechanism 45 in the transport direction of the metal strip S.

[0009] Specifically, a speed sensor 41 for detecting the moving speed of the metal strip S is provided on the transport path between the tensioning device 1 and the deflector roll 19 as shown in FIG. Then, based on the output signal of the speed sensor 41, the deflector roll 19 is configured to be rotationally driven in synchronization with the transition speed of the metal strip S. Further, there is provided a pressing roll 20 which is provided so as to be able to contact and separate from the deflector roll 19. Metal strip S than tensioning device 1
A termination sensor 36 for detecting the rear end of the metal strip S is provided on the upper side in the transport direction. Then, based on the output signal of the terminal sensor 36, the pressing roll 20 is configured to press and contact the deflector roll 19 via the metal strip S.

In the winding method according to the present invention, as shown in FIG. 1, a pair of winding mechanisms 8 for applying back tension by vertically sandwiching the metal strip S along the conveying path of the metal strip S whose surface is treated. 9, a belt bridle type tensioning device 1, a start-end sensor 3 for detecting a leading end of the metal strip S, a deflector roll 19, and a winder 5 having a belt wrapper 4 are arranged in this order. Thus, based on the output signal when the start sensor 3 detects the leading end of the metal strip S, the tensioning device 1 is operated, and the upper and lower winding mechanisms 8 and 9 are driven to rotate by the driving mechanism 45. At 8.9, the metal strip S is conveyed toward the winder 5, and when winding is started, a back tension is applied to the metal strip S and winding is performed.

More specifically, a speed sensor 41 for detecting the moving speed of the metal strip S is provided on a transport path between the tensioning device 1 and the deflector roll 19, and based on an output signal of the speed sensor 41, a deflector is provided. The roll 19 is driven to rotate in synchronization with the transition speed of the metal strip S.
Further, a pressing roll 20 is provided which is moved toward and away from the deflector roll 19, and the metal strip S
A termination sensor 36 for detecting the rear end of the metal strip S is provided on the upper side in the transport direction. Based on the output signal of the end sensor 36, the pressing roll 20 is pressed against the deflector roll 19 via the metal strip S, and the rear end of the strip is wound.

[0012]

The belt bridle type tensioning device 1 feeds the metal strip S between the pair of upper and lower winding mechanisms 8 and 9 toward the winder 5 to apply back tension when winding is started. At this time, the friction belt 16 moves along with the metal strip S, and generates frictional resistance between the metal belt S and the guide body 13 which is in contact with the inner surface of the metal strip S to generate tension. Therefore, only by changing the contact pressure between the guide body 13 and the friction belt 16, a sufficiently large back tension can be provided, and the change width can be expanded. Since the braking force is generated by the frictional resistance when the guide body 13 and the friction belt 16 come into sliding contact with each other, the treated surface of the metal strip S is not scratched.

In the standby state, the pair of winding mechanisms 8.9
Is separated, and the metal strip S sent from the preceding processing step can pass therewith without any trouble. Therefore, the metal strip S is transferred to the tensioning device 1 without any trouble by the conveying force from the pre-processing step. At this time, after the leading edge of the metal strip S is detected by the start sensor 3, the metal strip S is nipped and transported by the upper and lower winding mechanisms 8 and 9. Further, the tip of the metal strip S is wound around the winding core 26 several times by the belt wrapper 4. The back tension starts to work in parallel with the automatic winding by the bell trapper 4, so that the metal strip S can be given an appropriate back tension.

The deflector roll 19 is connected to a metal strip S.
The rotational drive is performed in synchronization with the transition speed in order to prevent the metal strip S from slipping and damaging the processing surface, particularly when the winding angle of the metal strip S around the deflector roll 19 is small. . Terminal sensor 3
6 detects the rear end of the metal strip S, presses the pressing roll 20 against the deflector roll 19, and
The reason why the metal strip S is supported at 9.20 is to stably convey and hold the rear end portion of the strip to the end so that the winding state is not disturbed until just before the end of the winding.

[0015]

According to the winding device of the present invention, a pair of upper and lower winding mechanisms 8 and 9 which can be separated from each other are transported toward the winding machine 5 with the metal strip S interposed therebetween according to the signal of the start sensor. When winding is started, winding is performed while applying a back tension.
The metal strip S sent from the preceding processing step is not interrupted to the winding machine 5 via the tensioning device 1 and the deflector roll 19 only by holding the standby state of the metal strip S 9 without any trouble. The entire operation from the setting of the metal strip S to the winding of the leading end of the strip by the belt wrapper 4 can be automatically performed.

Since the metal strip S is vertically held between the pair of upper and lower winding mechanisms 8 and 9 to provide a back tension, a larger back tension can be generated if necessary, and the width and thickness of the metal strip S can be increased. Even when the size is increased, sufficient back tension is applied to the metal strip S so that the metal coil can be formed in a tightly tightened state. Since at least one of the winding mechanisms 8, 9 is driven to rotate by the driving mechanism 45, that is, the metal strip S is taken up while being conveyed by the tensioning device 1, the proper back tension is given to the metal strip S from the beginning of the winding, and the winding is performed. Can be taken.

Since a sufficiently large back tension can be generated by the pair of upper and lower winding mechanisms 8 and 9, the installation space occupied by the tensioning device 1 can be reduced as compared with a conventional winding device having a roll bridle, and accordingly, Only the line length of the surface treatment line can be reduced and the space in the factory can be used effectively. Compared with the case where the tension control is performed by using a larger roll bridle, the overall cost of the winding device 1 is reduced,
The introduction cost can be reduced. In most cases, maintenance of the tensioning device 1 only requires replacing the friction belt 16, which is a consumable part. This greatly reduces the labor and cost required for maintenance work, and reduces the maintenance cost of the tensioning device 1. it can.

[0018]

1 to 4 show an embodiment of a winding device according to the present invention. In FIG. 1, the winding device moves along a transport path of a metal strip (hereinafter, simply referred to as a strip) S.
A belt bridle type tensioning device 1, a start sensor 3 for detecting the passage of the strip S at the conveyance leading end, a deflector roll 19, and a winder 5 equipped with a belt wrapper 4 are arranged in this order. The strip S has been surface-treated on one surface or both front and back surfaces in the processing steps up to the preceding stage. For example, after plating on each of the front and back surfaces, a base treatment is performed on the outer surface of the plating layer, and a paint is applied to each of the front and back surfaces to be dried and solidified.

In FIGS. 3 and 4, a tensioning device 1 is provided with a gate-shaped frame 7 straddling a strip S transport route back and forth.
And a pair of upper and lower winding mechanisms 8.9 that sandwich the strip S therebetween.
A pair of front and rear operating devices 10 for vertically operating the upper winding mechanism 8 with respect to the lower winding mechanism 9, and both mechanisms 8.9
And a drive mechanism 45 for rotationally driving each of them. The lower winding mechanism 9 of the two winding mechanisms 8 and 9 is the frame 7
The upper winding mechanism 8 is fixedly supported by the frame 7.
Are vertically slidably supported by guides 7a (see FIG. 4) provided on the front and rear frames of. As the operating device 10, a hydraulic cylinder or an air cylinder can be applied, and its piston rod is connected to the front and rear ends of a pulley frame 12 described later.

As shown in FIG. 3, the upper winding mechanism 8 includes a pulley frame 12 having a pair of left and right parallel pulley shafts 11 and a plurality of pulley frames 12 arranged adjacent to each other along the axis of the two pulley shafts 11. It is composed of a set of winding elements, a guide 13 fixed to the lower surface of the pulley frame 12, a reinforcing frame, and the like. The winding element comprises a pair of left and right pulleys 15 fixed to the pulley shafts 11 and a flat belt-shaped friction belt 16 wound around the pulleys 15. Of the two pulley shafts 11, the pulley shaft 11 located on the right side in FIG.
Can be rotationally driven by the driving mechanism 45.

The friction belt 16 is formed in two layers, inner and outer. Specifically, the contact layer 1 on the outer surface that contacts the strip S
6a is formed of a material having a large friction coefficient such as rubber, cloth, or cloth impregnated with rubber. Further, the inner sliding layer 16b which is in sliding contact with the guide body 13 is replaced with a contact layer 16 such as a steel belt or a plastic belt having excellent lubrication.
It is formed of a material having a smaller coefficient of friction than a. This is because even when the holding pressure is large, the friction belt 16 is smoothly slidably moved with respect to the guide body 13. The guide body 13 is formed of a copper alloy hollow body having a passage 17 for cooling water therein, and a group of friction belts 16 has left and right pulleys 15.
15 is attached to the pulley frame 12 so as to protrude from the outer tangent to the lower surface side.

The lower winding mechanism 9 is obtained by inverting the above-described winding mechanism 8 up and down.
Is fixed to the frame 17. Activate the operating device 10,
When the upper winding mechanism 8 is pressed down, the upper and lower friction belts 16 and 16 are strongly pressed by the guides 13 and 13, respectively, and sandwich the strip S from above and below. The drive mechanism 45 includes a motor 46, an electromagnetically operated clutch 47, a universal joint 48, and the like. The motor 46 and the clutch 47 are supported by a bracket fixed to the frame 7.

The deflector roll 19 is freely rotatable and guides the strip S toward the winding surface of the winder 5. The pressing roll 20 is freely rotatable, is disposed above the deflector roll 19, and is provided so as to be able to contact and separate from the roll 19.

The start sensor 3 comprises an optical sensor having a light projecting portion 3a and a light receiving portion 3b as shown in FIG.
In a state where the light emitting path crosses the transport path of the strip S,
The light projecting unit 3a and the light receiving unit 3b are arranged vertically. Sign 2
Reference numeral 2 denotes a guide swash plate that guides the transfer end of the strip S toward the winding machine 5.

The winding machine 5 has a winding shaft 25 driven to rotate by a motor 24 as shown in FIGS. 2 and 5, and the winding shaft 25 supports a winding core 26. Bell trapper 4
The arm 28 is supported by the frame 5a of the winding machine 5 so as to be able to swing left and right. A guide pulley 29, a pair of upper and lower tip guides 30 and 31, and a belt absorbing arm 32 are provided along the outer line of the arm 28. An endless winding belt 33 is wound around these members 29 to 32. In the non-use state, the arm 28 is displaced to the upper standby position shown by the imaginary line, and is displaced to the operating position shown by the solid line only when the leading end of the strip is wound around the winding core 26. In the illustrated example, the tip guides 30 and 31 are operated in the lower winding state. Since the belt wrapper 4 is a known mechanism, a detailed description thereof will be omitted. The strip S may be wound without using the core 26.

An end sensor 36 is provided between the tensioning device 1 and the guide roll 35 located on the upper side in the transport direction. The end sensor 36 is constituted by an optical sensor similar to the start sensor 3. Output signals of the start sensor 3 and the end sensor 36 are sent to the control device 37, respectively. The control device 37 controls the operation state and the operation state of each device such as the tensioning device 1, the pressing roll 20, and the winder 5 based on input signals from the sensors 3 and 36 and command signals output separately. I do.

The strip S sent from the preceding processing step to the winding device via the guide roll 35 is automatically wound into a coil according to the following procedure. Before starting the winding operation, the winding core 26 is fixed to the winding shaft 25,
The bell trapper 4 is in the operating position. Further, each of the tensioning device 1 and the pressing roll 20 is in a standby state. The upper winding mechanism 8 and the pressing roll 20 are respectively lifted upward, and both of them are retracted from the transport path of the strip S. Thereby, the sent strip S passes through the tensioning device 1 without any trouble.

The transport end of the strip S is the start sensor 3
When the optical path is blocked, a detection signal is output from the light receiving section 3b of the start sensor 3. On the basis of this signal, the winding mechanism 8 of the tensioning device 1 is operated to be lowered by the operation device 10 and cooperates with the lower winding mechanism 9 to sandwich the strip S up and down. The two winding mechanisms 8 and 9 are driven to rotate by the drive mechanism 45, and the strip S is conveyed toward the winder 5, and when the winding is started, a back tension is applied to the strip S. At this time, the friction belt 16 moves along with the strip S, and slides on the contact surface with the guide body 13 to generate frictional resistance. This frictional resistance acts as a back tension on the strip S. Therefore, the back tension can be freely changed over a wide range only by changing the operating pressure of the operating device 10 to a large or small value. Even when the width of the strip S is changed or the thickness dimension is different, a necessary and sufficient back tension can be provided.

When the passage of the rear end of the transport of the strip S is detected by the terminal sensor 36, the pressing roll 20 is switched to the pressing state based on the output signal. Therefore, even after the rear end of the transport of the strip S has passed through the tensioning device 1, the strip S moves while being supported by the pressing roll 20 and the deflector roll 19, thereby preventing the end of the strip from being disturbed.

The winding device described above can be partially modified and implemented as shown in FIG. The deflector roll 19 is rotatably driven by a motor 40, and the pressing roller 20 is freely rotatably supported so that the deflector roll 19 can simply be brought into contact with and separated from the deflector roll 19. In the transport path between the tensioning device 1 and the deflector roll 19, a strip S
A speed sensor 41 for detecting the transition speed of the vehicle is provided. In order to activate this speed sensor 41 only when necessary,
A pair of rolls 42 and 43 are arranged above and below the transport path, and the upper roll 42 is vertically displaced by an operating device (not shown) in the same manner as the pressing roll 20. Further, a speed sensor 41 is disposed at one end of the upper roll 42, and the transfer speed of the strip S is known from the rotation speed of the roll 42.

The upper roll 42 is pushed down based on an output signal when the start sensor 3 detects the front end of the transport of the strip S, and circumscribes the strip S to activate the speed sensor 41. Thereafter, based on the output signal from the speed sensor 41, the driving speed of the motor 40 is synchronized with the transition speed of the strip S. According to such a winding device, since the peripheral speed of the deflector roll 19 is completely synchronized with the transition speed of the strip S, even if the winding angle of the strip S with respect to the deflector roll 19 is small, the deflector roll 19 and the strip S are connected to each other. No slip occurs during That is, abrasion on the treated surface of the strip S due to slippage can be reliably prevented.

As the start sensor 3 and the end sensor 36, various sensors such as an image sensor, an infrared sensor, and a magnetic sensor can be applied in addition to the optical sensor. The bell trapper 4 can take any form other than the illustrated mechanism, and it is essential that the bell trapper 4 has a function of automatically winding the leading end of the strip around the core 26. The back tension may be adjusted by operating the operating device 10 to move the lower winding mechanism 9 or both of the upper and lower winding mechanisms 8 and 9 toward and away from the operating device 10. Only one of the winding mechanisms, for example, only the lower winding mechanism 9 fixed and supported by the frame 7 may be rotationally driven by the driving mechanism 45.

[Brief description of the drawings]

FIG. 1 is a principle explanatory view conceptually showing a winding device.

FIG. 2 is a schematic front view of the winding device.

FIG. 3 is a longitudinal sectional front view of a main part of the tensioning device.

FIG. 4 is a view taken in the direction of arrows AA in FIG. 3;

FIG. 5 is a schematic front view showing another embodiment of the winding device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tension device 3 start sensor 4 bell trapper 5 winder 8.9 winding mechanism 10 operating device 19 deflector roll 20 pressing roll 26 core 36 end sensor 41 speed sensor 45 drive mechanism S metal strip

Claims (4)

(57) [Claims] 1. A belt bridle type tensioning device 1, a starting end sensor 3, a deflector roll 19, and a winding machine 5 provided with a belt wrapper 4 are provided along the transport path of the surface-treated metal strip S. The tensioning device 1 is configured to connect a pair of upper and lower winding mechanisms 8.9 holding the metal strip S to at least one of the two mechanisms 8.9 toward the other side. And an operating device 10 for performing a separating operation. Each of the two winding mechanisms 8 and 9 includes a pair of right and left pulleys 15 and 15 fixed to the pulley shaft 11, and both the pulleys 15 and 15.
A plurality of winding elements, each including a pair of friction belts 16 wound between the belts 15, and a guide body 13 for receiving the inner surface of the group of friction belts 16 that come into contact with the metal strip S. - 9 at least one of the metals strips S
And a driving mechanism 45 that is driven to rotate in the transport direction of the deflector roll 19.
A pressure roll 20 is provided, which is closer to the transport direction of the metal strip S than the tensioning device 1.
Is a terminal sensor 3 for detecting the rear end of the metal strip S.
6 is provided, and based on the output signal of the end sensor 36, the pressing low
Of the deflector roll 1 through the metal strip S
9. A winding device for a surface metal strip, wherein the winding device is configured to be brought into press contact with the surface metal strip 9. 2. A speed sensor 41 for detecting a moving speed of the metal strip S is provided on a transport path between the tensioning device 1 and the deflector roll 19, and based on an output signal of the speed sensor 41, The winding device for a surface-treated metal strip according to claim 1, wherein the deflector roll (19) is driven to rotate in synchronization with a transition speed of the metal strip (S). 3. Transport of the metal strip S subjected to surface treatment
Along the path, sandwich the metal strip S up and down
Belt including a pair of winding mechanisms 8 and 9 for applying tension
Bridle-type tensioning device 1 and transport of metal strip S
Start sensor 3 for detecting the tip and deflector roll 1
9 and a winder 5 equipped with a belt wrapper 4 are arranged in order.
And a pressing roller which is operated to approach and separate from the deflector roll 19.
And the tensioning device 1 is made of metal.
After the metal strip S on the upper side in the transport direction of the strip S
An end sensor 36 for detecting the end is provided, and the start sensor 3 detects the leading end of the metal strip S.
The tension device 1 is operated based on the output signal when the
While the upper and lower winding mechanisms 8 and 9 are rotationally driven by the driving mechanism 45,
Then, the metal strip S is fed to the winder 5 by the two winding mechanisms 8.9.
Transport to the winder 5 and start winding on the winding machine 5.
A back tension is applied to the lip S and the lip S is wound, and the end sensor 36 detects the rear end of the transport of the metal strip S.
The pressing roll 20 is moved to the metal
Pressed against deflector roll 19 via trip S
To wind the rear end of the metal strip S around the winder 5.
And a winding method for a surface-treated metal strip. 4. The tension device 1 and the deflector roll 19
The transfer speed of the metal strip S is detected in the transport path between
A speed sensor 41 is provided.
−41 based on the output signal of
Rotate and drive in synchronization with the transition speed of the metal strip S
A method for winding a surface-treated metal strip according to claim 3 .